1-1/4" Stainless Steel Threaded Ball Valve (985)

The 985 is a 1-1/4-inch stainless steel threaded ball valve engineered for full-port, quarter-turn shutoff in high-pressure, high-temperature, and chemically aggressive piping systems where stainless steel's corrosion resistance, mechanical strength, and temperature performance are the governing material requirements and where NPT threaded end connections deliver the installation convenience and future serviceability that welded and flanged alternatives cannot provide at this diameter and pressure class.

The 1-1/4-inch diameter occupies a specific and well-defined position in the stainless steel threaded ball valve size range — a size that appears less frequently than 1-inch or 1-1/2-inch in standard residential and light commercial plumbing but that is a regular specification in industrial process piping, commercial mechanical systems, and specialized process equipment connections where 1-1/4-inch is the correct hydraulic size for the specific flow rate and service conditions of the branch line, equipment connection, or distribution sub-header being isolated. In industrial and process system design, 1-1/4-inch pipe is a deliberate hydraulic sizing choice — appearing where the flow rate served by the line falls between the capacity of 1-inch pipe and the larger capacity of 1-1/2-inch pipe — and the 985 is the isolation valve specification that corresponds to this deliberate design sizing decision.

As the middle size between the 986 (1-1/2-inch) and the smaller 1-inch size in the stainless steel threaded ball valve family, the 985 serves the specific flow capacity tier of process and industrial piping systems where 1-1/4-inch hydraulic sizing is the design result — the equipment supply connections, process unit branch lines, and distribution sub-headers that carry flow volumes requiring exactly this intermediate pipe diameter for proper velocity management and pressure drop control within system design parameters.

The stainless steel body delivers the same core performance characteristics that define the full stainless threaded ball valve series — the passive oxide layer corrosion resistance that handles aggressive chemical environments, the mechanical strength for elevated operating pressures beyond the PVC service envelope, and the temperature performance for steam, high-temperature process fluid, and elevated ambient temperature service where plastic valve bodies are not the correct specification. At 1-1/4 inches, the stainless steel body delivers these performance characteristics in the compact, lightweight physical format appropriate for the branch line and equipment connection applications that characterize this size range — where installation often occurs in confined spaces, tight equipment clusters, and multi-valve assemblies where the physical scale of the valve body directly affects installation practicality.

The full port (full bore) ball design maintains a consistent inside diameter through the valve body equal to the connecting pipe inside diameter — the hydraulically correct specification for 1-1/4-inch process and distribution system isolation valves where maintaining full flow capacity at the isolation point is the design requirement and where the pressure drop of a reduced-bore valve body would accumulate into measurable system performance degradation across multi-valve installations.

The threaded (NPT) end connections provide the direct inline installation, minimal hardware requirement, and future serviceability that make threaded ball valves the dominant manual isolation valve format across the 1-1/4-inch service range — direct installation with PTFE tape or thread sealant, no welding or flange assembly required, and future removal by unthreading for inspection or replacement without cutting pipe or modifying the surrounding system.

The quarter-turn lever handle delivers immediate positive shutoff with a single 90-degree rotation and unambiguous visual position indication — the operational reliability and simplicity that makes the ball valve the correct manual isolation valve specification across the full range of industrial, process, and commercial piping applications at this size.

Manufactured to the same stainless steel construction standard as the 986 and 987, the 985 completes the 1-1/4-inch position in the stainless threaded ball valve size series on Maxx-Supply — providing the correct isolation valve specification for the specific hydraulic sizing tier that 1-1/4-inch pipe represents in industrial and process system design.

Specifications

Industries & Applications

The 985 stainless steel threaded ball valve is the isolation specification for 1-1/4-inch branch lines, equipment connections, and distribution sub-headers across the full range of industrial, process, and commercial system applications where stainless steel material is required:

• Chemical Processing & Industrial Plants — Individual equipment supply isolation on chemical process systems where 1-1/4-inch branch lines feed specific reactor connections, chemical metering and dosing equipment supply ports, heat exchanger inlet and outlet connections, and process instrument supply lines at the individual equipment connection tier of chemical process piping systems; stainless steel body chemistry handles the full range of corrosive process fluids at these individual equipment connection points without the carbon steel corrosion and brass dezincification that compromise alternative valve body materials in aggressive chemical service.
• Food & Beverage Processing — Ingredient supply line isolation, CIP chemical branch connections, product transfer line shutoffs, and utility water branch valves in food and beverage manufacturing where stainless steel material compliance, surface cleanability, and resistance to caustic CIP chemistry are standard specification requirements across every process fluid contact point; 1-1/4-inch is a common supply and branch connection size in food processing piping systems at the individual equipment supply connection tier where stainless threaded ball valves are specified throughout.
• Brewery & Distillery Process Piping — Fermentation vessel supply connections, transfer line branch isolation, heat exchanger supply valves, and glycol cooling system branch connections in craft and industrial brewing and distilling operations where 1-1/4-inch supply and transfer connections to individual process vessels and heat exchangers are common at the equipment connection tier; stainless steel material compatibility with alcohol, yeast, wort, and aggressive CIP cleaning chemistry and the hygienic surface standards of beverage production define the valve material specification at every process fluid contact point.
• Pharmaceutical & Biotech Manufacturing — Process water distribution branch connections, purified water (PW) and water for injection (WFI) supply line isolation valves, chemical reagent supply branch shutoffs, and utility connection isolation on individual process equipment in pharmaceutical and biotech manufacturing facilities where stainless steel material traceability, electropolished or passivated surface finish documentation, and chemical resistance across process fluid and cleaning chemistry contact are material qualification requirements of regulated manufacturing environments.
• Steam & High-Temperature Condensate Systems — Steam distribution branch isolation at individual heat exchangers, process vessel jacket connections, and steam-heated equipment supply lines; condensate return branch connections and trap bypass isolation in industrial and commercial steam systems where operating temperatures exceed the PVC service envelope and where stainless steel condensate corrosion resistance eliminates the ongoing maintenance cost of carbon steel condensate system valve corrosion; confirm temperature and pressure ratings against specific steam system conditions before specifying.
• Marine & Offshore Piping Systems — Seawater cooling branch connections, fuel system supply line isolation, potable water distribution branch shutoffs, and process fluid handling connections on commercial vessels, naval vessels, and offshore platforms where 1-1/4-inch branch and supply connections are prevalent across the complex multi-system piping infrastructure of marine and offshore installations; 316 stainless steel specification is critical for chloride-containing marine service environments where 304 stainless is subject to chloride pitting corrosion under continuous marine exposure conditions.
• Oil & Gas Chemical Injection & Utility Systems — Chemical injection branch valves, methanol injection line connections, corrosion inhibitor supply line isolation, and utility piping branch shutoffs at wellsite and midstream facilities where 1-1/4-inch branch connections to individual injection points and utility supply connections are specified throughout chemical injection manifold and wellsite utility piping systems; stainless steel handles the H2S, high-chloride produced water chemistry, and hydrocarbon service conditions that define oil and gas field corrosive service environments.
• Compressed Air & Industrial Gas Distribution — Branch isolation on compressed air distribution systems where 1-1/4-inch branch takeoffs from larger distribution mains feed individual machine tool connections, pneumatic equipment clusters, and process air supply points; stainless steel internal surface resistance to moisture cycling corrosion in compressed air systems eliminates the internal corrosion debris generation that contaminates pneumatic equipment and instrument air systems downstream of carbon steel valve bodies with inadequate moisture management.
• High-Purity Water & Laboratory Systems — Reverse osmosis distribution branch valves, deionized water supply line shutoffs, laboratory utility water connections, and analytical instrument supply isolation in research, laboratory, and high-purity manufacturing environments where stainless steel material compatibility with ultrapure water, trace chemical reagents, and the stringent material requirements of high-purity fluid contact applications defines the valve material specification at every system branch point.
• HVAC & Mechanical — Steam & High-Pressure Applications — Steam system branch connections at individual terminal heating units, high-pressure chilled water branch supply valves, and condensate return line isolation at individual heat exchangers and coils in large commercial and industrial HVAC and mechanical systems where 1-1/4-inch represents the branch connection size at the individual equipment supply tier of large central plant distribution systems.